Texas BBQ Posse members loaded up a couple of cars on Tuesday and headed down to Red Oak to check out lunch at Randy’s Bar-B-Que. Daniel Vaughn had named Randy’s the number 2 BBQ joint in DFW in his recent D Magazine rankings, so we had to check it out for ourselves. We were wheels up at 11:10 or so from downtown Dallas. Posse member Irwin Thompson warned that we better get there by before noon or risk a long line. We pulled in the lot a little bit after 11:30 and barely beat the crowd. It’s a nondescript building…